<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/touxiang.png" alt />
        <span>德玛西亚后台管理系统</span>
      </div>
      <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? 64+'px':200+'px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
            <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
              <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

              <!-- 二级菜单 -->
            <el-menu-item :index="subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState(subItem.path)">
               <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
            </template>
            
           </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主题 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return {
      menuList:[],
      iconsObj:{
        '125':'el-icon-user-solid',
        '103':'el-icon-s-tools',
        '101':'el-icon-box',
        '102':'el-icon-document',
        '145':'el-icon-s-marketing'
      },
      isCollapse:false,
      // 被激活的地址
      activePath:''
    }
  },
  created(){
    this.getMenuList(),
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    loginOut() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    async getMenuList(){
       const{data:res} = await this.$http.get('menus')
       if(res.meta.status != 200) return this.$message.error(res.meta.msg)
       this.menuList = res.data 
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse
    },
    // 保存菜单激活状态
    saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath
    }
  }
};
</script>

<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-header img {
  width: 50px;
  height: 50px;
}
.toggle-button{
  background-color: #4a5064;
  color: #fff;
  text-align: center;
  line-height: 24px;
  font-size: 10px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  height: 100%;
}
</style>